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evaluation test Research of DR Inspection System for Circumferential Welds in Long Distance Pipeline

材料导报 2024年第22期38卷 223-229页

作者： WANG Changjiang WANG Xue ZHANG Shimin ZHAO Yan LYU Xinyu ZHONG Qian ZHOU Guangyan College of Mechanical and Transportation Engineering China University of Petroleum-BeijingBeijing 102249China Pipe China Engineering Technology Innovation Co. Ltd.Tianjin 300450China China Petroleum Pipeline Research Institute Co. Ltd.Langfang 065000HebeiChina Engineering Department of National Petroleum and Natural Gas Pipeline Network Group Co. Ltd.Beijing 100020China

Digital radiographic(DR)testing equipment has been widely promoted and applied in the inspection of circumferential welds in oil and gas *** order to establish a comprehensive quality control system for digital radiographic testing and fully evaluate the integrated system inspection ability of equipment,personnel,and processes,a scientific and standardized evaluation method to the system is very *** investigates the precedents of relevant non-destructive testing evaluation methods at home and abroad,considers the testing characteristics of DR equipment,develops a complete set of DR testing system evaluation *** deeply studies the adaptability methods of program processes from defect production to slicing processing and data statistical calculation for digital radiographic testing *** check the repeatability and reliability of the detectable system,five process welds with 200 real metallographic defects were fabricated in the *** the detected results,the DR system has good repeatability in image quality,and the detectable defect size reaches 0.85 mm under achieving 90%detection probability at a confidence level of 95%,the error of detected defect length is±2 mm,and the error of detected defect localization is±5 *** qualitative and quantitative detection of defects are accurate and *** test further confirmed the reliable detection ability of the DR detection system,and fully validated the scientific and practical evaluation method *** research on the evaluation test method can serve as an important link in the quality control system for the on-site application of digital ray equipment in long-distance *** designed program,test,and evaluation content can serve as an important basis for the formulation of relevant specifications or standards.

关键词： digital ray evaluation test repeatability reliability

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Depth Research on Brake Energy Regeneration evaluation and test Method of Electric Driven Vehicle

Depth Research on Brake Energy Regeneration Evaluation and T...

引用

2015中国汽车工程学会年会

作者： Yang Yu Mingqiu Gao Mengliang Li Yingnan Zhang China Automotive Technology ＆ Research Center

Analysis of the current domestic and international laws and regulations related to electric vehicles braking,the electric drive vehicle energy flow model,comparing several conditions vehicle testing often used to finalize the test method to evaluate the brake energy recovery *** pure electric vehicles,plug-in hybrids and low-voltage pure electric vehicles,tested according to the test method described to obtain the three models braking safety performance,braking energy recovery rate,continued driving mileage contribution rate data to verify the reasonableness of the proposed test method.

关键词： electric car brake energy recovery evaluation test

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